“…optimal C/N ratio between 20 and 30; 5 < pH < 6, optimal temperature (> 50°C) (Yin et al 2023 ) and substrate concentration between 10 and 20 g l −1 . Some were confirmed by a recently performed meta-analysis which relates high productivity to 6 ≤ pH ≤ 6.8 and 35°C ≤ T ≤ 37°C and H 2 high yield to 5.5 ≤ pH ≤ 7.5 (Lopez-Hidalgo et al 2022 ). Much lower pH is postulated in installation implementing patent (Ignaciuk and Ignaciuk 2018 ).…”
Section: Production Of Fuels Under Low Ph Conditionsmentioning
Awareness is growing that human health cannot be considered in isolation but is inextricably woven with the health of the environment in which we live. It is however under-recognised that the sustainability of human activities strongly relies on preserving the equilibrium of the microbial communities living in/on/around us. Microbial metabolic activities are instrumental for production, functionalization, processing and preservation of food. For circular economy, microbial metabolism would be exploited to produce building blocks for the chemical industry, to achieve effective crop protection, agri-food waste revalorization or biofuel production, as well as in bioremediation and bioaugmentation of contaminated areas.
Low pH is undoubtedly a key physical-chemical parameter that needs to be considered for exploiting the powerful microbial metabolic arsenal. Deviation from optimal pH conditions has profound effects on shaping the microbial communities responsible for carrying out essential processes. Furthermore, novel strategies to combat contaminations and infections by pathogens rely on microbial-derived acidic molecules that suppress/inhibit their growth.
Herein, we present the state-of-the-art of the knowledge on the impact of acidic pH in many applied areas and how this knowledge can guide us to use the immense arsenal of microbial metabolic activities for their more impactful exploitation in a Planetary Health perspective.
“…optimal C/N ratio between 20 and 30; 5 < pH < 6, optimal temperature (> 50°C) (Yin et al 2023 ) and substrate concentration between 10 and 20 g l −1 . Some were confirmed by a recently performed meta-analysis which relates high productivity to 6 ≤ pH ≤ 6.8 and 35°C ≤ T ≤ 37°C and H 2 high yield to 5.5 ≤ pH ≤ 7.5 (Lopez-Hidalgo et al 2022 ). Much lower pH is postulated in installation implementing patent (Ignaciuk and Ignaciuk 2018 ).…”
Section: Production Of Fuels Under Low Ph Conditionsmentioning
Awareness is growing that human health cannot be considered in isolation but is inextricably woven with the health of the environment in which we live. It is however under-recognised that the sustainability of human activities strongly relies on preserving the equilibrium of the microbial communities living in/on/around us. Microbial metabolic activities are instrumental for production, functionalization, processing and preservation of food. For circular economy, microbial metabolism would be exploited to produce building blocks for the chemical industry, to achieve effective crop protection, agri-food waste revalorization or biofuel production, as well as in bioremediation and bioaugmentation of contaminated areas.
Low pH is undoubtedly a key physical-chemical parameter that needs to be considered for exploiting the powerful microbial metabolic arsenal. Deviation from optimal pH conditions has profound effects on shaping the microbial communities responsible for carrying out essential processes. Furthermore, novel strategies to combat contaminations and infections by pathogens rely on microbial-derived acidic molecules that suppress/inhibit their growth.
Herein, we present the state-of-the-art of the knowledge on the impact of acidic pH in many applied areas and how this knowledge can guide us to use the immense arsenal of microbial metabolic activities for their more impactful exploitation in a Planetary Health perspective.
“…The transition from laboratory-scale production of gaseous biofuels to sustainable industrial production is fraught with challenges such as low yields compared to the theoretical maximum and the need to remove by-products [132] . Unfortunately, the majority of research has been done in laboratory settings, and rarely on a fractional-technical scale.…”
Section: Existing Obstacles In Algae Fermentation Technologymentioning
“… 90 Biomass with high carbon and water content such as sewage, food waste, and agricultural residues can be used as raw materials. 91 Figure 2 Hydrogen production by dark fermentation of microalgae The three main dark fermentation processes of microalgae to produce hydrogen are shown. Formic acid catabolism, NADH re-oxidation, and pyruvate ferredoxin oxidoreductase (PFR) oxidation of pyruvate are the three main ways in which microalgae dark fermentation produces hydrogen.…”
Section: Conventional Strategies and General Requirements For Biohydr...mentioning
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